slv_check_bounds performs no check when vused = 2 and hi=-1 in a system with 2 variables
(see test/test compiler_bintok.gradient_nobintok for example). Change the call so that
it checks bounds on all variables instead.

Change use of 'snprintf' to a macro so that MinGW-64 can substitute it with _snprintf.
Minor text changes in ascPrint.h.
Move 'general' config.h definitions into ascend/general/config.h. Hope this will reduce amount of rebuilding arising from minor changes.
Fix bug in ascEnvVar.c arising from string like "=sillydef" with no leading varname.
Still need to fix ascEnvVar.c for case like " = sillydef".
Bug found with sundials-config when MinGW fstab /mingw does not point to c:\MinGW.
Removed support for 'g77' compiler as alternative to 'gfortran'.
Fixed SCons error message when LyX is not present.
Removed disused Makefile.in file.
Removed some debug output in ascEnvVar and printutil.c.
Some reformating of SConstruct.

Update all tests after installing PyGTK All-in-one (fixes bug 498).
Static linking top libgfortran for LSODE (fixes bug 497).
Removed attempts at MD5 sum checking, but installer is able to use local copies of downloaded files now.

Resolved memory leak with test/test solver_ipopt.formula.
Still some issues to overcome with regard to inactive relations, probably.
Some issue still occurring when attempting to run whole solver_ipopt suite in one go.

Merging in refactor of the C++ code, which is moved out of 'pygtk' and into 'ascxx'.
Adding support for IPOPT 3.9.1, the current latest version.
Support in dtar for parallel builds (possibly needs some testing still).

Fixed bug #361.
Moved a number of vars out of SUBST_DICT to prevent config.h changes from spawning a rebuild of libascend.
Eliminated use of ASC_WITH_CONOPT from C code (still need ASC_LINKED_CONOPT for the moment).